Guests: Donald C. Johanson, Lucy

Scientist and "Lucy" discoverer Donald C. Johanson will talk about his atheism, evolution and how he feels about "Ardi" displacing "Lucy." FFRF'er John Whiteside will talk about why he underwrote a billboard blitz in Las Vegas for the Foundation, featuring 10 billboards variously reading: "Imagine No Religion," "Beware of Dogma" and "Praise Darwin: Evolve Beyond Belief."